Generic name: trihexyphenidyl hydrochloride
Dosage form: oral syrup
Drug class:Anticholinergic antiparkinson agents
Medically reviewed by Drugs.com. Last updated on Feb 21, 2022.
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Trihexyphenidyl Elixir Description
Trihexyphenidyl Hydrochloride Elixir, for oral administration, is a synthetic antispasmodic drug.
Each 5 mL contains 2 mg trihexyphenidyl hydrochloride and alcohol 5% in a clear, colorless, lime-peppermint flavored preparation. In addition, it contains the following inactive ingredients: Citric Acid, Flavoring, Methylparaben, Propylparaben and Sorbitol Solution.
Trihexyphenidyl Hydrochloride is a white or slightly off-white, crystalline powder, having not more than a very faint odor.
Trihexyphenidyl Hydrochloride is the substituted piperidine salt, (±)-α-Cyclohexyl-α-phenyl-1-piperidinepropanol hydrochloride. It has the following structural formula:

The pH range of Trihexyphenidyl Hydrochloride is between 2.0 and 3.0.
Trihexyphenidyl Elixir - Clinical Pharmacology
Trihexyphenidyl exerts a direct inhibitory effect upon the parasympathetic nervous system. It also has a relaxing effect on smooth musculature; exerted both directly upon the muscle tissue itself and indirectly through an inhibitory effect upon the parasympathetic nervous system. Its therapeutic p...